Decomposition of Lignocellulose from a Freshwater Macrophyte by Aero-Aquatic Fungi

Mineralization of uniformly radiolabeled$[{}^{14}{\rm C}]\text{lignocellulose}$and specifically radiolabeled$[{}^{14}{\rm C}\text{-lignin}]\text{lignocellulose}$from the freshwater sedge Carex walteriana by five aero-aquatic fungi was investigated. The extent of mineralization varied among the five...

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Bibliographic Details
Published in:Microbial ecology 1992-06, Vol.23 (2), p.159-167
Main Authors: Matthias Bergbauer, Moran, Mary Ann, Hodson, Robert E.
Format: Article
Language:English
Subjects:
Biological and medical sciences
Biology of microorganisms of confirmed or potential industrial interest
Biotechnology
Fresh water
Freshwater
Fundamental and applied biological sciences. Psychology
Fungi
Lignin
Mission oriented research
Mitosporic fungi
Oxidation
Oxides
Phenols
Physiology and metabolism
Polysaccharides
Stems
Swamps
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Summary:Mineralization of uniformly radiolabeled$[{}^{14}{\rm C}]\text{lignocellulose}$and specifically radiolabeled$[{}^{14}{\rm C}\text{-lignin}]\text{lignocellulose}$from the freshwater sedge Carex walteriana by five aero-aquatic fungi was investigated. The extent of mineralization varied among the five species from 2.2 to 4.2% for the lignin component and from 3.3 to 20.6% for the polysaccharide component. The extent of mineralization of both lignin and polysaccharide moieties by a mixed culture of the five fungi were generally markedly lower than by pure cultures, possibly due to the production of antimicrobial compounds. Spirosphaera floriformis, the most active strain in lignin as well as in polysaccharide mineralization, degraded ferulic acid faster than p-coumaric acid. Decomposition of Carex walteriana lignocellulose by this strain resulted in decreased cinnamyl/vanillyl (C/V) and syringyl/vanillyl (S/V) ratios.
ISSN:0095-3628
1432-184X
DOI:10.1007/bf00172637